/* Header styles for Zone Twister HU */

.zt-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background-color: rgba(255, 253, 247, 0.96);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(229, 231, 235, 0.7);
}

.zt-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--space-8);
  padding-bottom: var(--space-8);
  gap: var(--space-8);
}

/* Brand */

.zt-header__brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-6);
  color: var(--color-text);
}

.zt-header__brand-text {
  font-family: var(--font-family-display);
  font-weight: 700;
  font-size: var(--font-size-xl);
  letter-spacing: 0.03em;
}

.zt-header__logo-mark {
  position: relative;
  display: inline-grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2px;
  width: 30px;
  height: 30px;
  border-radius: 40%;
  padding: 4px;
  background: radial-gradient(circle at 20% 0, #ffe3eb, transparent 60%),
    radial-gradient(circle at 80% 100%, #dbeafe, transparent 60%);
  box-shadow: var(--shadow-sm);
}

.zt-header__dot {
  width: 100%;
  height: 100%;
  border-radius: 50%;
}

.zt-header__dot--pink {
  background-color: var(--color-primary);
}

.zt-header__dot--yellow {
  background-color: var(--color-secondary);
}

.zt-header__dot--blue {
  background-color: var(--color-accent-blue);
}

.zt-header__dot--green {
  background-color: var(--color-accent-green);
}

/* Navigation */

.zt-header__nav {
  position: relative;
}

.zt-header__nav-list {
  display: flex;
  align-items: center;
  gap: var(--space-6);
  list-style: none;
}

.zt-header__nav-item {
  position: relative;
}

.zt-header__nav-link {
  position: relative;
  display: inline-flex;
  align-items: center;
  padding: 0.3rem 0.1rem;
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--gray-700);
}

.zt-header__nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -0.25rem;
  height: 3px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent-blue));
  transform-origin: center;
  transform: scaleX(0);
  transition: transform var(--transition-normal);
}

.zt-header__nav-link:hover::after,
.zt-header__nav-link:focus-visible::after {
  transform: scaleX(1);
}

.zt-header__nav-link:focus-visible {
  outline: 3px solid var(--color-accent-blue);
  outline-offset: 4px;
  border-radius: 999px;
}

.zt-header__nav-item--highlight .zt-header__nav-link {
  padding-inline: 0.9rem;
}

.zt-header__nav-link--cta {
  border-radius: 999px;
  background-image: linear-gradient(120deg, var(--color-primary), var(--color-accent-blue));
  color: #ffffff;
  box-shadow: var(--shadow-sm);
}

.zt-header__nav-link--cta::after {
  display: none;
}

.zt-header__nav-link--cta:hover {
  transform: translateY(-1px) scale(1.01);
  box-shadow: var(--shadow-md);
}

/* Toggle button (mobile) */

.zt-header__toggle {
  display: none;
  align-items: center;
  gap: var(--space-4);
  padding: 0.4rem 0.75rem;
  border-radius: 999px;
  border: 1px solid var(--gray-200);
  background-color: #ffffff;
  box-shadow: var(--shadow-xs);
  color: var(--gray-800);
}

.zt-header__toggle:focus-visible {
  outline: 3px solid var(--color-accent-blue);
  outline-offset: 3px;
}

.zt-header__toggle-box {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  gap: 3px;
  width: 18px;
}

.zt-header__toggle-line {
  width: 100%;
  height: 2px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent-blue));
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

.zt-header__toggle-text {
  font-size: var(--font-size-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

/* Toggle animation when menu is open */

.zt-header--menu-open .zt-header__toggle-line:nth-child(1) {
  transform: translateY(4px) rotate(45deg);
}

.zt-header--menu-open .zt-header__toggle-line:nth-child(2) {
  opacity: 0;
}

.zt-header--menu-open .zt-header__toggle-line:nth-child(3) {
  transform: translateY(-4px) rotate(-45deg);
}

/* Mobile navigation panel */

@media (max-width: 768px) {
  .zt-header__inner {
    padding-top: var(--space-6);
    padding-bottom: var(--space-6);
  }

  .zt-header__toggle {
    display: inline-flex;
  }

  .zt-header__nav {
    position: absolute;
    inset-inline: 0;
    top: 100%;
    background-color: rgba(255, 253, 247, 0.98);
    border-bottom: 1px solid rgba(229, 231, 235, 0.9);
    box-shadow: 0 12px 30px rgba(15, 23, 42, 0.12);
    transform-origin: top;
    transform: scaleY(0.95);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity var(--transition-normal), transform var(--transition-normal), visibility var(--transition-fast);
  }

  .zt-header--menu-open .zt-header__nav {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: scaleY(1);
  }

  .zt-header__nav-list {
    flex-direction: column;
    align-items: flex-start;
    padding: var(--space-8) var(--space-16) var(--space-12);
    gap: var(--space-4);
  }

  .zt-header__nav-link {
    width: 100%;
    padding-block: 0.55rem;
    font-size: var(--font-size-base);
  }

  .zt-header__nav-link::after {
    bottom: 0;
    height: 2px;
  }

  .zt-header__nav-item--highlight .zt-header__nav-link {
    margin-top: var(--space-4);
  }

  .zt-header__nav-link--cta {
    justify-content: center;
    width: 100%;
  }
}

/* Larger screens */

@media (min-width: 769px) {
  .zt-header__nav-list {
    gap: var(--space-10);
  }
}